Why Distant Radiators Stay Cold: Balancing Your Heating System

The heat-transfer fluid follows the path of least resistance. Without balancing, it «short-circuits» through the circuits closest to the boiler, while those farther away receive too little flow. The result is overheating in some rooms and cold in others — even with a perfectly functioning boiler. **What balancing means** Balancing means setting the resistance of each circuit so that the flow rate matches the calculated heat output for that room. The tool for this is a static [balancing valve](/catalog/balansuval-klapany) with a defined flow coefficient Kvs. **How to set it up** Every balancing valve has a presetting scale. Using the design flow rates and the Kvs table, you set the number of turns on each circuit: distant circuits are opened further, nearby ones are throttled back. This eliminates «hydraulic imbalance» once and for all. **Underfloor heating manifolds** On [underfloor heating manifolds](/catalog/kolektory-pidloha) it is more convenient to use models with built-in flow meters — adjustment is done visually using the float indicator. For radiator systems, static valves with a scale are sufficient. **The role of the pump group** In [Termojet pump groups](/catalog/nasosni-hrupy), a balancing valve is already integrated — the circuit is set to the design flow rate without any additional fittings. Proper balancing also reduces energy bills: the boiler no longer runs at full capacity just to overheat the nearest rooms.